Betting both sides of a market at different sportsbooks to create a theoretical margin.
Arbitrage (arbing) uses pricing differences between sportsbooks. When one book has significantly different odds than another on the same event, a complete hedge can create a theoretical margin if every leg is accepted and graded as expected.
Arbitrage is deterministic only on paper: odds can move before both legs are accepted, books can reject or limit wagers, void rules can differ, and stake rounding can change the result. Margins also vary by market and product, so verify the current slips before acting.
Even when pure arbitrage is hard to sustain as a primary strategy, the underlying skill of line shopping — finding the best available odds — is valuable because better prices improve the math of any wager.
Caesars lists Alcaraz at +115 vs Sinner while BetMGM has Sinner at −105. Plug into the arb formula: 1/2.15 + 1/1.952 = 0.465 + 0.512 = 0.977. Since that is under 1.00, the model shows a covered theoretical return.
Stake $465 on Alcaraz at Caesars and $512 on Sinner at BetMGM for a total outlay of $977. If both bets are accepted and graded as expected, either winner returns $1,000, modeling $23 profit (2.35% ROI) before execution risk. The catch: sportsbooks aggressively limit accounts that hit arbs, so pros rotate across 8+ books and avoid round-number stakes that trip fraud models.
<p>Caesars lists Alcaraz at <strong>+115</strong> vs Sinner while BetMGM has Sinner at <strong>−105</strong>. Plug into the arb formula: 1/2.15 + 1/1.952 = 0.465 + 0.512 = <strong>0.977</strong>. Since that is under 1.00, the model shows a covered theoretical return.</p><p>Stake <strong>$465 on Alcaraz</strong> at Caesars and <strong>$512 on Sinner</strong> at BetMGM for a total outlay of $977. If both bets are accepted and graded as expected, either winner returns <strong>$1,000</strong>, modeling <strong>$23 profit (2.35% ROI)</strong> before execution risk. The catch: sportsbooks aggressively limit accounts that hit arbs, so pros rotate across 8+ books and avoid round-number stakes that trip fraud models.</p>
Check stake split, payout, and profit before treating a price gap as usable.
Use this toolGo deeper with the related lesson, examples, and plain-English rules.
Continue learningThe commission a sportsbook charges on a bet, built into the odds.
A sportsbook promo stake where a winning ticket usually pays profit only, not stake plus profit.
A professional or highly skilled bettor whose action influences line movement.
The difference between the odds you bet at and the final odds at market close.
Betting both sides of a market at different sportsbooks to create a theoretical margin.
<p>Caesars lists Alcaraz at <strong>+115</strong> vs Sinner while BetMGM has Sinner at <strong>−105</strong>. Plug into the arb formula: 1/2.15 + 1/1.952 = 0.465 + 0.512 = <strong>0.977</strong>. Since that is under 1.00, the model shows a covered theoretical return.</p><p>Stake <strong>$465 on Alcaraz</strong> at Caesars and <strong>$512 on Sinner</strong> at BetMGM for a total outlay of $977. If both bets are accepted and graded as expected, either winner returns <strong>$1,000</strong>, modeling <strong>$23 profit (2.35% ROI)</strong> before execution risk. The catch: sportsbooks aggressively limit accounts that hit arbs, so pros rotate across 8+ books and avoid round-number stakes that trip fraud models.</p>
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